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Abstract #4708

Cardiac PET-MRI to measure cardiac efficiency access Alginate intramyocardial injections in a porcine heart failure model

Mehrzad Tartibi1, Uttam Shrestha2, Youngho Deo3, Grant Gullberg4, Christopher T. Nguyen5, Vahid Ravanfar3, Qizhi Fang3, and Randall J. Lee3
1DelBeat, Berkeley, CA, United States, 2University of California San Francisco, San Francisco, CA, United States, 3University of California, San Francisco, San Francisco, CA, United States, 4Lawrence Berkeley National Laboratory, Berkeley, CA, United States, 5Cleveland Clinic, Cleveland, OH, United States

Synopsis

Keywords: Cardiomyopathy, Heart, Hear efficiencyNearly 70% of heart attacks (myocardial infarctions, MI) cases lead to a condition known as heart failure (HF), where the left ventricle (LV) remodels. Previous alginate and stem cell intramyocardial injection studies reported mixed outcomes using the LV global volumetric function and local myocardium mechanical response (strains and stresses)1,2. Such measures involve unvalidated assumptions yielding erroneous results3. We conducted a swine HF study treated with a particular alginate intramyocardial injection; however, instead of using the mechanical response, we directly measured the metabolic energy consumed by the myocardium before and after treatment using Positron emission tomography–magnetic resonance images (PET-MRI)4.

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Keywords